Insulating material.



C. M ABBOTT.

INSULATING MATERIAL.

APPLICATION FILED APILG. 19H.

Patented Feb. 22, 1916.

l VT/vcssss f W W1 (R 7B wmb CHARLES M. ABBOTT, OF WATERTOWN.MASSACHUSETTS. ASSIGNOR TO SAMUEL CABOT, INQ, OF BOSTON. MASSACHUSETTS.A CORPORATION OF MASSACHUSETTS.

Specification of Letters Patent.

Patented Feb. 22, 1916.

A licatio and April 6, 1911. Serial No. 619,253.

terial the use of a paper with an interposed,

hod of sueh material as dried eel grass. the paper and eel grass hein;stitehed to hold them together. For eonrenienee in handling.- thismaterial is formed in wehs ol' rolls with the stitehing runninglongitudinally thereof. To meet ordinary ((Illl mereial requirements twowidths are needed.

- hut. l have found by a certain arrangement of the strip that l amenabled to produee a smgle standard size strip \\'lll('ll may he variedinto the smaller size strip in the main ner and for the purposeshereinafter explained. l have. furthermore. diseovered that h theproportiounient of the roteriug paper to the lillin; material used l amalile te seeure a suh'stantially noneomhnstilile insulati on. l.furthermore. find that 1 ani ahle to seeure a proper ro iortioiunentthrough the use of a eertain ltlud of paper pulp. as will he more fullset forth.

.\s illustrative of iu invention l have shown in the drawings a form ofmy insulatin; material.

'lhroughout speeiliration and drawings like referenee numerals areeiuplo \-'ed to in dieate ('(H'lespulullllg parts. and in thedrawiugs:ligure l is a plan \ie'w of a frag" ment of my quilt. and Fig.L' a transverse sertion of the same. 7

'lhe insulating strip is formed of two strips of paper l and 2 with aninterposed lillin; ll of eel grass or other suitahle material. 'lheseelements are stitrlied together l| seams l. 5 and (l. The seams l arerun loiujitiuliuall elose to the edges of the strip. and the seams 5between tlieeil e of the strip and the small or niedialline thereof. Theseams (l are stite'hed a short distant-e on eat-h side from the medialline. whieh is indieated at 7.

'hen it is desiredto use tlie'inaterial between joists the stripinziy helongitudinally split along the lint-7. thus forming two strips eaehstitehed along its outside edge. The material is usually made in a 36"width so that when split two strips 18" wjde will he ser-ured. thusallowing for the H" spaee between joists with a 2" margin for fastening.

The sheets 1 and 2 are made from sulfateof soda paper pulp. IlHH'O foundthat lu' using paper made from this pulp I am able to keep the weight ofthe paper down to about.

12"? of the weight of the total insulating: material. This amount ofpaper. even though it he in itself eoinhustihle. will not when eomhinedwith the eel grass afl'ord sullirient ignition to burn tl 1 insulation.

This is a great advantage as under these ('ir ruinstanees theinsulat'ioivnot only affords protei'tiou from heat'aud eold hut is apraetieal fireprooling for or lin'ar purposes.

Various modilieations may. of ron'rse. he made in the several elementsof the ai'tit'le. all without departing from the spirit of my inventionif within the limits of the appended elaiin.

'hat l. therefore. elaiin and desire to rure l) Letters Patent is:

.\s an artiele of manufacture. a suhstantiallr lire proof insulatingstrip comprising a pair of eovel'ing sheets iuannfaetnred from sulfateof soda paper stoelt and a filletof suhstantiallr iiou-eomlnlstihleinsulating material disposed therehetweeu. said covering sheetseomprising suhstantiall twelve per rent. of the t tal weight of thestrip and eomhining with the suhstantially noueomhnstihle filler toprevent ignition of the strip in testimony whereof. I atlix my sig'uature in presenee of two witnesses.

. (llAltLlCS M. ABBOTT.

\l'itnesses:

L. l). GOHDWIN, R. B. llLLus.

